﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

namespace MvcSecurityStudy
{
    public partial class StackOverflow : System.Web.UI.Page
    {
        protected void Page_Load(object sender, EventArgs e)
        {

        }

        protected void Button1_Click(object sender, EventArgs e)
        {
            this.Label1.Text = this.Fac(int.Parse(this.TextBox1.Text)).ToString();
        }

        private decimal Fac(int n)
        {
            if (n == 1)
            {
                return n;
            }

            return n + this.Fac(n - 1);
        }
    }
}